Waterproof Co. · Waterproof Phone Chargers & Cables
Nitecore Carbo 20 Power Bank
Waterproof power banks often use water-repellent coating coatings; brand provides no PFAS details.
Nitecore Carbo 20 is marketed as waterproof, but the brand discloses nothing about PFAS in protective coatings. Waterproofing treatments commonly contain PFAS; unverified status creates uncertainty.
The safe swap
Casetify
CASETiFY PowerThru 2-in-1 Charging Stand
85/100 safety
Same rubric that flunked this product. The swap earned its B.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Lithium battery, plastic/polymer housing, waterproof coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
The Nitecore Carbo 20 is built around a lithium-ion battery cell (the energy storage core), enclosed in plastic/polymer housing, with a waterproof coating applied to the exterior to resist water ingress. Lithium batteries themselves are well-understood but require isolation from moisture and mechanical damage to prevent short circuits or thermal runaway. The waterproof coating, typical for water-resistant power banks, is the primary unknown here: manufacturers often use water-repellent coating (water-repellent coating) treatments, which in commodity products may contain PFAS (covered separately). Plastic housing can leach small amounts of additives (plasticizers, flame retardants) under stress or heat, though modern phone chargers are not typically heated to problematic temperatures during normal use.
The brand's record and disclosure
Nitecore is primarily known for flashlights and battery products, with generally positive reputation for build quality. However, the brand provides no published materials safety data, PFAS declarations, or third-party certifications (such as UL, CE, or restricted substance statements) visible in public sources. There are no widely documented recalls or safety controversies associated with Nitecore Carbo power banks specifically. The parent company (Waterproof Co., as stated here) does not publicly disclose polymer sourcing, coating chemistry, or commitment to PFAS reduction.
How it compares in its category
Among portable lithium-ion power banks, the Carbo 20 is positioned as a premium, rugged option with emphasis on durability and waterproofing. Competing brands (Anker, RAVPower, Goal Zero) similarly lack transparent PFAS disclosure but often publish battery certifications and material safety summaries more readily. Power banks in this durability tier typically trade off slightly higher risk of unknown coating chemistry for the benefit of mechanical robustness; mass-market alternatives may use simpler coatings with fewer unknown additives but less water protection. Nitecore's market position does not set it apart as safer or riskier than direct competitors on non-PFAS hazards.
If you buy it
Keep the device away from prolonged heat (above 50 C / 122 F) and high humidity to minimize battery stress and any risk of coating degradation leaching into contact surfaces. Inspect the housing regularly for cracks, scratches, or separation of the waterproof seal; if visible damage occurs, discontinue waterproofing claims and handle as a standard power bank. Replace the unit if the battery becomes visibly swollen, charges very slowly, or generates heat during normal use, these are signs of internal lithium-ion failure. Clean the device with a dry cloth; avoid submerging in fresh water for extended periods despite the waterproof rating, as seals degrade over time.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Lithium-ion battery thermal runaway or short circuit
Lithium batteries are stable under normal conditions but can fail if punctured, overcharged, or exposed to water ingress past the seal. Nitecore does not publish battery management circuit specifications or overcharge protection details; assume standard protection is present but verify compatibility with your charger.
Plastic housing leachates (plasticizers, antimony catalysts, flame retardants)
No specific reports of leaching from Nitecore Carbo 20 housing. Polymer composition is not disclosed; most lithium-ion power bank housings use ABS or PC/ABS blends with low risk of leaching at room temperature, but prolonged heat exposure or contact with solvents could mobilize additives.
Waterproof coating degradation and unknown chemical composition
water-repellent coating coatings on polymer goods frequently contain PFAS or other fluorinated compounds; Waterproof Co. does not disclose coating material. Over 2-3 years of use, coatings typically wear or peel, potentially releasing particles or residual chemicals into the environment, though direct user exposure is low.
Electrolyte or internal component leakage if seal fails
If the waterproof seal is breached (via physical damage or normal aging), internal lithium-ion electrolyte can contact skin or eyes, causing chemical burn. Nitecore does not publish seal material composition or expected lifespan; inspect seals regularly for visible separation.
Inadequate overcharge or over-discharge protection (brand-specific risk not ruled out)
Nitecore is a reputable brand and likely uses standard battery management ICs, but without published specifications or third-party certification (UL, FCC), protection adequacy cannot be independently verified. No recalls of Carbo 20 due to charging failure are on record.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 35% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
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No PFAS risk signals identified.
⚠Brand says nothing about PFAS
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Likely lower concern; no disclosed PFAS use in typical charging stands.
⚠Brand says nothing about PFAS
More waterproof phone chargers & cables grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.